Aeroplane



Aug.26,193o. A. Q TAFLAN v1,773,889

AEROPLANE Filed oct. 25, 1929 I s sheets-sheet 1 Harri. 6

ATTORNEY INVENTCR Aug. 26, 1930. A, @..TAFLAN 157135889 AEROPLANE Filed 00u25, 1929 s sheets-#smet `2 :tl ai; 0f (i.

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INVENTOR ATTORNEY Aug. 26, 1930., A. s. TAI-'LAN AEROPLANE Filed oct. 25, 1929 3 Sheets-Sheet 3 d. Tama VIL #v L i .Y

Patented-@$251930 Y. e i i i l `v f "i1',7 73,889

AEBorLANE I Application filed ctober25,'1929. Serial No. 402,433.

This invention relates to improvements in 4In these views', the nuuieral l indicates aeroplanes, the general object ofthe yinveirV the fuselage of the ship and 2 the wing there'- tiony beingto: provide automatic lateral stabil` olf, the `fuselagel lbeing connected with theiziiig ,means by suspei'idingthe fuselage from wing by the pivotal connections 3 so tl'iatthe 5 the Wing bya pivotal connection and confuselage can have swinging movement about 5; necting theaileronswith thefuselage'in such "a horizontal axis with respect to the wing. a-inanner that theftilting movement of the Thepropeller 4.- and the power piant 5 are Y:fuselage:under rth-e'afction of thevertical rudcarried by the wing at the 'l'ront centeiv there- ,dcr ywill operate the ailerons and cause the ofl and the vertical rudder 6 at the tail of the 10 Shiptoban'k and turn, after which' the parts fuselage is arrangedbelow Vthe planeet the .te i

are(automatically lreturned vto normal posipivotal points 3.' rlhe yusual vertical lin y7 tion when ytheru'dde'r is moved back to its is attached to the top of' the tail parteiv straight position, thusmaking itA necessary 'the fuselage and said fuselage is provided for the pilot to lmove the verticalrudderin Wthtlie usual landing gear@ and sl'id '9.

i5 ordm-t0 Cans@ the Ship ,t0 turn, The wing is provided with theusnal ai 'is C3v Another object of lthe inventionis to prolO and these ailerons are operated by the tilte Videmeans Wherebyt'hehorizontal rudder is ing movement of the fuselage under the. 21C- .causedtoremainparallelwiththe wingin tion of the rubber 6 through means of the allA positions of the wing. f Y v Vbell cranks 11 connected ,with the fuselage by This invention alsoconsists in certainother the llinks 12 and with. the bell cranks 123 by 'i' features of construction and in the combina the links 14thebell'cranks 13 being connecttion and'ariangcn'ient of the several-parts, to ed with the ailerons by the connections l5. be hereinafter ully described, illustrated in Thus when the rudder' 6 is turned by the the accompanying,drawngsand specifically plotto make a left hand turn, for instance,

Pointed out in the appendedelamg, f the action of the wind onL the rnd-derwill In describing the invention in detail, ref-V cause the fuselage to tilt, as shown in Figure erencewill be hadtotheaccompanying draw- 7, andqthis movement ot .the fuselage .'wiil ings wherein likev characters denote like or Cause the right hand aileron tolower and n corresponding parts throughout the several lthe left hand aileron to raise through the couao views? and nwhiCh;- nections shown at 1 2," 11, 112,' 13 and l5. HO l Figure 1 is 'an elevation with parts broken These positions of the ailerons will, of course,

away, of an aeroplane constructedin accord- @M158 tll'wlig t0 tilt SO that@ ne ship will ance with this invention.v` bank and turn in theusualimanner andr as Figure 2 is a front view thereof, with parte Will be seen,V the operation ot the aileronsis broken away, automatic and the only thingnecessary for $5 Figure 3 is 'a top plan View with parte the pilot to do when he wishes to make a turn brokenaway. -i is to adjust the rudder 6. ,As soon as the Figure 4 is a section onv line .4f-4 ofFgf rudder 6 is moved back,` the fuselage will rc-k 111193); j l "turn to its normal po'sitionandv thus` he ,40 Figure' is a' sectionon line 5 5 of Fig-y n ailerons will be movedbackto their normal F50,

ure ,3. .y Y i e ,Y position and the ship will then fly on an even Figurev 6 isa section on line (5#6`of Figkeelf i 4 i Y p ure 1. L The horizontal rudder 16 is formed with Figure 7 is afront View showing how the a section 17 which fits in a recess 18 formed fuselage is tilted when the vertical rudder in the rudderand the two sectionsareconis turned and the ailerons operated by the `nected together at the rear edgeof the section movement of the fuselage to ycause the ship 17 by lthe links 19. Two pairs of coni/erge to bank. ing rods 20`have r,their outer ends connected Figure Sis a top plan view showing a modi-` withtlie ends of the .section 17, the four rods iication.

l l o l I f having their inner ends terminating in a de- L" pending part 21. These rods pass through openings 22 in the tail part of the fusela;vu so that the depending part is within the fuselage. Oppositely extending links 23 pivotally connected with the depending part 2l and these links are cach connected to a bell crank 24: pivoted to the tail part of the fuselage and a link or rod connects each bell crank with a bell crank 26 arranged within the fuselage adjacent each side thereof, the rods 25 passing through holes in the fuselage. The bell cranks i are coniuufted by the links 2T with a part of the wing, so that relative movement between the wing and fuselage will, throu the conne hewn, cause the rods E2] to more the sectiim 17 and, therefore. the section 1G, so that the horizontal rudder remains para iol with the wing in all positions of the wing relative lo the fuselage. The manner of conaertin2 seetions 16 and 17 togetherl permit the ction 1G to be tilted in the usual manner by the pilot.

Instead of using the connections just described for keeping the horizontal rudder parallel with the wing., I may use the rigid connections 28 between the section 17 and the wing, these connections being in the form of bars, longerons or the like and one of which is arranged on each side of the fuselage and has its ends rigidly connected with the section 17 and its other end with the wing, as shown in Figure 8.

In order to lessen the danger of side slips, I form each tip of the wing with a sloping front part 28, as shown in Figure 2, the slope extending downwardly and rearwardly from the front of the wing, with the front edge of the sloping part diagonally arranged and extending from the upper outer corner of the tip downwardly and inwardly7 to a point a distance from the extremity of the wing.

From the above, it will be seen that I have provided an auton'iatie lateral stability for an aeroplane, so that it is simply necessary for the pilot to operate the vertical rudder in order to make turns, without it being necessary for the pilot to adjust the ailerons, with means for keeping the horizontal rudder parallel at all times with the wing without interfering with the tilting movement of the vertical rudder when it is desired to cause the ship to ascend or descend.

This invention acts to automatically keep the ship laterally stable while in flight, even in rough weather conditions.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

1. An aircraft comprising a fuselage, a wing, means for pivotally connecting the top of the fuselage with the under side of the wing whereby the fuselage has tilting move ment about a horizontal axis with respect to the wing, a vertical rudder at the tail of the fuselage, ailerons carried bythe Wing, conections between the fuselage and the ailerons whereby tilting movement of the fuselage under the action of its vertical rudder will cause operation of the ailerons to cause the ship to turn and bank, a propeller and its power plant connected with the front part of the wing, a horizontal rudder and means whereby the horizontal rudder is caused to remain parallel with the wing in all positions of the wing.

2. An aircraft comprising a fuselage, a wing, means for pivotally connecting the top of the fuselage with the under side of the wing so that the fuselage can tilt about a horizontal axis, ailerons carried by the wing, a vertical rudder carried by the fuselage, connections between the fuselage and the ailerons whereby tilting movement of the fuselage will operate the ailerons, atwo part horizontal rudder, one part being pivoted to the fuselage to move about a horizontal axis, connections between said partand the wing whereby the rudder is caused to remain par-- allel with the wing in all positions of the wing, means for pivoting the second part to the first part whereby the second part can be tilted upwardly or downwardly and propulsion means for the craft.

3. An aircraft comprising a fuselage, a wing, means for pivotally connecting the top of the fuselage with the under side of the wing so that the fuselage can tilt about a horizontal axis, ailerons carried by the wing, a vertical rudder carried by the fuselage, connections between the fuselage and the aile rons whereby tilting movement of the fuse lage will operate the ailerons, a two part horizontal rudder, one part being pivote/d to the fuselage to move about a horizontal and longitudinal axis, connections between said part and the wing whereby the rudder is caused to remain parallel with the wing in all positions of the wing, means for pivoting the second part to the first part whereby the second part can be tilted upwardly or downwardly and a propeller and its power plant connected with the front part of the wing.

In testimony whereof I afiix my signature.

ALEXANDER G. TAFLAN. 

